Variety is the spice of life. Since 99% of sexual gratification exists purely in the mind, yours is probably getting bored. Mix things up, try different strokes, different "items". Explore your body. I'm sure something will come to you.

If you want a total grip around you cock, you can use both hands instead of one hands. The other thing you can do is put one hand around the bease of the cock and the other hand above and enjoy wanking like that, it is cool to do!

Grip your cock...loosely... palm down on the top of your shaft.... so that your right thumb is on your right nut (if you're right handed). It's that feeling you get when someone is giving you a hand job. Note that your palm will stimulate the glands and penis head more.